<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 状态 -->
      <el-alert title="添加商品信息" type="info" center show-icon></el-alert>

      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基础信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="tabPosition"
          :before-leave="beforeLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称:" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格:" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量:" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量:" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类:">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";
export default {
  data() {
    return {
      activeIndex: 0,
      tabPosition: "left",
      // 添加商品表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        // 商品详情
        goods_introduce: "",
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名", trigger: "blur" },
          { min: 1, max: 10, message: "长度在 1 到 10 个字符", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
          { min: 1, max: 10, message: "长度在 1 到 10 个字符", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
          { min: 1, max: 10, message: "长度在 1 到 10 个字符", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
          { min: 1, max: 10, message: "长度在 1 到 10 个字符", trigger: "blur" }
        ]
      },
      cateList: [],
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
        expandTrigger: "hover"
      },
      manyTabData: [],
      onlyTabData: [],
      headerObj: {
        Authorization: window.sessionStorage.getItem("token")
      },
      previewPath: "",
      previewVisible: false
    };
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      // console.log(res);
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类数据失败");
      this.cateList = res.data;
    },
    // 级联选择框变化触发的函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeLeave(activeName, oldActiveName) {
      // console.log("即将进入的标签页" + activeName);
      // console.log("即将离开的标签页" + oldActiveName);
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请优先选择商品分类");
        return false;
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex);
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" }
          }
        );

        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        // console.log(res.data);
        this.manyTabData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" }
          }
        );
        // console.log(res.data);
        this.onlyTabData = res.data;
      }
    },
    handlePreview(file) {
      console.log(file);
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    handleRemove(file) {
      const filePath = file.response.tmp_path;
      const i = this.addForm.pics.findIndex(x => x.pic === file.path);
      this.addForm.pics.splice(i, 1);
    },
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error("请输入必填的表单项");
        }
        // 添加的业务逻辑
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join();

        // 处理动态参数列表
        this.manyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          };
          this.addForm.attrs.push(newInfo);
        });
        // 处理静态属性列表
        this.onlyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;
        console.log(form);

        // 发请求
        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) return this.$message.error("添加商品失败");
        this.$router.push("/goods");
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  },
  created() {
    this.getCateList();
  }
};
</script>

<style scoped>
.el-steps {
  margin-top: 30px;
}
.el-steps_title {
  font-size: 16px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>